Analysis of cosolvent effect on supercritical carbon dioxide extraction for α-pinene and 1,8-cineole

Yusuke Shimoyama, Hiroki Tokumoto, Takumi Matsuno, Yoshio Iwai

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The solubilities of α-pinene and 1,8-cineole in supercritical carbon dioxide with and without cosolvent were measured by using a circulation type apparatus coupled with an on-line Fourier transform infrared (FT-IR) spectroscope at 323K and 8.0MPa. The cosolvents interested in this work were ethanol, water, acetone and hexane. The solubilities were measured under vapor-liquid two phases. The effects of cosolvents on the solubilities and selectivities of α-pinene and 1,8-cineole in supercritical CO2 were investigated. The selectivities at feed concentration of cosolvent of 0.056molL-1 were increased 1.23 times by ethanol and decreased 0.82 times by hexane. Peng-Robinson equation of state with a quadratic mixing rule was used for correlations of the solubilities for α-pinene and 1,8-cineole in supercritical CO2 with and without cosolvent. The correlated results reproduce the experimental data of cosolvent effects on the solubilities and selectivities of α-pinene and 1,8-cineole in supercritical CO2.

Original languageEnglish
Pages (from-to)1563-1568
Number of pages6
JournalChemical Engineering Research and Design
Volume88
Issue number12
DOIs
Publication statusPublished - Dec 1 2010

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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